V2O5-WO3/TiO2催化氧化NO性能研究

V2O5-WO3/TiO2 catalyst was prepared by impregnation method. The effects of loading, calcining temperature, volume fractions of NO and O2, and space velocity on V2O5-WO3/TiO2 catalytic oxidation of nitric oxide were studied, and the resistance to poisoning of H2O and SO2 was investigated. The support and catalysts were characterized by BET, XRD and FT-IR analysis. The results showed that the optimum catalyst can obtain the oxidation rate about 31.2%, when the volume fraction of NO 550×10-6, O2 10% and space velocity 5000 h-1 at 120℃, at this point in series with the wet absorbing device can be made higher than the 70% denitrification efficiency, could meet the NOx concentrations of less than 1100 mg/m3 absorption requirements. The catalyst's poisoning is slow at 120℃, but activity can be restored after heated to 250℃, so we can use twin-bed parallel mode of operation, one bed for catalytic oxidation reaction and the other for heating regeneration, this mode can be applied to oxidative absorption NOx of flue gas effectively.